Improvement in the manufacture of white lead



acta sale @tutti @da Letters Patent No.v113,014, dated March 28, `1871.

IMPROVEMENT IN THE MANUFACTURE OF'WHiTE LEAD.

The Schedule referred to in these Letters Patent and rnaking part of the same.

To all whom it may concern Be it-known that I, LUDWIG BRUML'EN, of Hoboken, iu the county of Hudson and State of New Jersey, have invented a new and useful Improvement in the'il'lanufa'cturevof White Lead; and l do hereby declare that the following isla full, clear, vand exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this speciiication.

The ligure is a' side view of my improved device,

partly in section, toshow the construction.

ln the manufacture of white lead or thecarbouate of lead from a basic solution of lead by precipitation by means ol' carbonio acid, it is essential for the production of the best quality of white lead that the carbonio acid should be introduced asuearly as possible in a uniform stream, and that the said stream should be divided as lfinely asv possible into minute streams and transmitted through the whole volume of solution being operated upon.

My invention has for its object to effect a uniform and thorough distribution of the carbonio acid through the entire quantity og the solution being operated upon; and

It consists in an improvedmode of doing this, and 4in the device by which it is accomplished. l

A large tank, the capacity of which is immaterial, is filled with the solution of' lead. .y To a step or socket in the center ofthe bottom of the saidtank is pivoted the lower end of an upright shaft, A, the upper end ot' which is supported in suitable bearings, and which is revolved by any convenient power.

The shalt A is perforated longitudiually, and into the upper end of said perlbratiou 1s introduced au iron pipe, B, about which the said shaft revolves.

The pipe B is connected with an airpnmp by means of which the carbonio acid is forced through the shaft A, into the solution of lead, in a uniform stream.

With the lower part of the perforated shaft-A are connected two or more cross-pipes, C, of copper or other suitable material, and perforated with numerous small holes, which pipes O, as they are carried around by and with the revolving shaft A, introduce the acid in minute streams through Athe entire mass of the solution.

Glose below the pipes C is attached a cross-arm, D,

4equal in length to the interior diameter of the tank,

and provided with plus or fingers, E, projecting downward, so as to just clear the bottom of the tank.

By lthis means the entire contents of the tank will be put into motion, thus bringing the acid in contact with every particle of said contents.

Having thus described my invention,

I claim as new and desire to secure by Letters Iatent- 1. .The revolving tubular perforated shaft A, per.-

forated cross-pipes G, cross-arm D, and fingers E,

combined, as described, with an air-pipe, B,A for the purpose of distributing the carbonio acid in close contact with as many particles of the basic solution of lead as possible.

2. The process of applying to the basic solution of leadv continuous ne streams of carbonicacid under the pressure oi" a current of air, as described.

The above specilication 0fA my invention signed by me this 2d day of August, 1870.

LUDWIG BRUMLEN.

Witnesses:l

` JAMES T. GRAHAM,

T.: B. Mosman. 

